Engineering Chemistry Unit 3 Notes AKTU (BAS102)

AKTU · BTECH · Semester 1, 2 · Engineering Chemistry · Unit 3 · Notes

AKTU Engineering Chemistry (BAS102) Unit 3 notes for B.Tech Semester 1/2 – Electrochemistry, Batteries, Corrosion and Engineering Materials. Topics: Basic…

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Unit 3: Electrochemistry, Batteries, Corrosion and Engineering Materials – AKTU syllabus topics

  • Basic Electrochemistry Concepts
  • Batteries and Cells: Primary Cells Dry Cell, Secondary Cells Lead Acid Battery
  • Corrosion: Types and Causes of Corrosion, Corrosion Prevention and Control, Corrosion in Specific Industries
  • Cement: Manufacturing of Cement, Setting and Hardening of Cement, Plaster of Paris POP

Most asked AKTU PYQ questions from Unit 3

  1. Q2d. Give significance of Nernst equation. Consider a cell reaction: Zn / Zn2+ [0.1M] || Cu2+[0.2M] / Cu. Standard reduction potential of Zn2+ and Cu2+ are -0.76V and 0.34V respectively. Write half-cell reactions, complete cell reaction and calculate EMF of the cell. (10 marks, 2020-21)
  2. Q5a. Discuss the construction and chemistry of charging/discharging of Lead Acid battery. (7 marks, 2024-25)
  3. Q2c. Explain the mechanism of Hydrogen evolution and Oxygen absorption with the help of electrochemical theory of corrosion. Explain noble and sacrificial metallic coatings for preventing corrosion. (7 marks, 2023-24)
  4. Q5a. Differentiate between primary and Secondary batteries? Discuss the various reactions involve during the charging and discharging of lead storage battery. (7 marks, 2023-24)
  5. Q2c. Illustrate the various steps involved during manufacturing of Portland cement with the help of a labelled diagram. Give the chemical reactions involved during setting and hardening of cement. (7 marks, 2023-24)
  6. Q5a. Illustrate the working, diagrammatic representation and cell reaction of Lead Acid storage battery during charging and discharging. (7 marks, 2023-24)
  7. Q5b. Briefly explain wet corrosion. How corrosion can be prevented by Metallic coating and using corrosion inhibitors? (7 marks, 2023-24)
  8. Q2c. Define Corrosion. How can corrosion be minimized by sacrificial anodic protection and impressed current cathodic protection methods? (7 marks, 2022-23)
  9. Q5a. Discuss the mechanism of electrochemical corrosion of iron with evolution of hydrogen. What will happen if a zinc rod is vertically half submerged under water? (7 marks, 2022-23)
  10. Q2c. Explain the setting and hardening of cement with relevant chemical reactions involved during the process. (7 marks, 2022-23)

AKTU paper codes: BAS102, BAS202, KAS102, KAS202

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